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Experiment on the Charging and Discharging Processes of a Closed Ice-Thermal-Energy-Storage System  

Kim, Kyung-Hwan (Division of Facilities, Changwon National University)
Yoon, Young-Hwan (Department of Mechanical Engineering, Changwon National University)
Kim, Yeon-Kyu (New Tech Engineering Co., LTD)
Publication Information
Journal of Energy Engineering / v.16, no.4, 2007 , pp. 164-169 More about this Journal
Abstract
The decrease in the summer peak electric load in our country is very important. The government has arranged and implemented a lot of support policies and statutes to decrease the peak electric load. And the ice-thermal-energy-storage system is known as one of the alternatives. The purpose of this paper is to evaluate the performance and the total efficiency of its storage tank, conducting the charging operation, the parallel operation and the single operation of a storage tank. The thermal energy density stored and discharging efficiency of a storage tank and the efficiency of total energy utilization of system are $18.4\;USRT-h/m^3$, 96.2% and 2028.7 kcal/kWh under the operation of design condition. When the storage tank is supplied more ice thermal energy than design condition, it is estimated that the efficiency of system are lower than the design condition by the supercooled effect.
Keywords
Closed ice thermal energy storage system; Thermal energy density stored; Efficiency of total energy utilization;
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